Which of the following statements is true? a.) Using a sample size of 20 or less can be representative in simulations. b.) To achieve theoretical certainty, trials of chance should be repeated. c.) Simulations are based on trials of chance that mimic real-life events. d.) Simulations utilize certain rules to get estimates closer to theoretical probability. SUBMIT MY ANSWER

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step-by-step explanation:

a; x = 0.5

step-by-step explanation:

-10x = -5

x = 0.5

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).